Question

The product of 2 number is 36 their sum is 20 what are the number

Answer 1

Answer:

Let one of the number be x

sum of the two numbers=20

x+another number=20

Thus another number=20-x

Now product of the numbers=36

x*(20-x)=36

20x-x^2=36

20x-x^2 -36=0

-x^2 -20x -36=0

-x^2 -18x -2x -36=0

-(x^2+18x)-(2x+36)=0

-x(x+18)-2(x+18)=0

either x+18=0 or -x-2=0

either x=18 or x=-2

either numbers are 18 or 20-18=2 or numbers are -2 or 20-(-2)=20+2=22